In the given flow chart,the replication of a retrovirus in a host cell is shown. Observe it carefully and fill in the blanks $A, B$,and $C$.

• A
  $A-$Retrovirus,$B-$Viral $DNA$ is produced,$C-$New viral $RNA$ is produced by the infected cell
• B
  $A-$Transcriptase,$B-$Bacterial $RNA$ is produced,$C-$New viral $DNA$ is produced by the infected cell
• C
  $A-$Reverse transcriptase,$B-$Viral $DNA$ is produced,$C-$New viral $RNA$ is produced by the infected cell
• D
  $A-$Reverse transcriptase,$B-$Bacterial $RNA$ is produced,$C-$New viral $DNA$ is produced by the infected cell